This document provides an overview of computer networks, touching on types such as LAN, PAN, MAN, and WAN, alongside the advantages and disadvantages of these networks. It discusses the internet's role as a global network for communication and information sharing, as well as the applications of sensor and vehicular networks in various domains such as security and traffic management. Additionally, it highlights examples and benefits of each type of network.

1. Week-7:Computer
Networks
Prepared by-Ms. Suchi Laad
CSE Dept
CMRIT
31-10-2023

2. AGENDA
 Introduction to Computer Networks
 Network Types
 Internet
 Sensor Networks
 Vehicular Networks

3. Introduction to Computer Networks
 Also known as data network, is a collection of interconnected nodes
capable of exchanging data.
 Node – Each station in a communication network is called a node.
Components of Computer Network
 Two or more computers.
 Cables(coaxial, twisted pair or fiber optic) to link computers.
 Network Interface Card(NIC)
 Switches
 A software called network operating system.

4. Advantages of Networks
 Increased Speed
 Reduced Cost
 Improved Security
 Centralized Software Management
 Flexible access
Disadvantages of Networks
 High Cost of Installation
 Requires time for administration
 Failure of Server

5. Network Types
 A computer network can be classified into four types
 It is a collection of computers that are linked together in a local area, such
as building or office.
 A LAN connects computers by coaxial cable, twisted pair etc.
 It is less expensive.
 LAN offers more security.
1) LAN(Local Area Network)

6.  A PAN is a network that is set up for a single person for personal usage.
 Laptops, mobile phones are used to establish a personal area network.
 There are two types of WAN:
 Wired personal area network
 Wireless personal area network
Examples are Small Home Office where devices are connected through
internet via VPN.
2) PAN(Personal Area Network)

7.  It is a network that connects many LANs to build a bigger network.
 Government agencies utilise MAN to communicate with residents and
private business.
 MAN is used in communication between the banks in a city.
 It can be used in Airline Reservation.
 It can be used for communication in military.
3) MAN(Metropolitan Area Network)

8.  A WAN is a network that is expanded to a broad geographical area, such
as states or countries.
 It is connected through telephones lines, and satellite connectivity.
 It is utilised in business, government, and education.
 Examples of WAN are Mobile Broadband(4G Network), Private network etc.
4) WAN(Wide Area Network)

9. Internet
 The internet is a vast network that connects computers all over the world.
 Through Internet, people can share information and communicate from
anywhere with an internet connection.
 It was first created in 1969 by ARPANET.

10. Uses of Internet
 E-mail- It is an electronic message that is delivered from one computer to
another through a network.
 World Wide Web- It is a popular information sharing service on internet.
 E-commerce- It includes variety of online goods and services having
commercial operations.

11. Sensor Networks
 It is a group of sensors where each sensor monitors data in different location
and sends it to the central location for storage, viewing and analysis.
Applications of Sensor Networks
 1) Home Security- The primary goal of home security is to detect an
intruder.
 Examples are glass-break sensor, security cameras, motion detectors.
2) Environmental Monitoring- Researchers, farmers need to moniter aspects of
natural environment such as air pollution, soil quality and weather metrices.
So instead of manual approach, we use automated sensor network.

12.  3) Municipal Surveillance- It is mostly used by Police Officers to check on
crimes happening in the city through surveillance cameras.
 4) Earthquake Detection- It is the most scientific way to detect earthquake
through sensor networks.

13. Vehicular Networks
 1) It is a wireless network used in vehicles that safety road applications to
drivers.
 2) It minimises accidents and collision.
 3) Advantages of Vehicular Networks are-
- Increase comfort
- Reduce traffic jams
- Decrease travel times
- Relieve driver efforts

14. Thankyou!